1242055 has 16 divisors (see below), whose sum is σ = 1568160. Its totient is φ = 943488.

The previous prime is 1242029. The next prime is 1242061. The reversal of 1242055 is 5502421.

It is a cyclic number.

It is not a de Polignac number, because 1242055 - 2⁷ = 1241927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11341 + ... + 11449.

It is an arithmetic number, because the mean of its divisors is an integer number (98010).

2^1242055 is an apocalyptic number.

1242055 is a deficient number, since it is larger than the sum of its proper divisors (326105).

1242055 is a wasteful number, since it uses less digits than its factorization.

1242055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1242055 is about 1114.4752128244. The cubic root of 1242055 is about 107.4930228030.

Adding to 1242055 its reverse (5502421), we get a palindrome (6744476).

The spelling of 1242055 in words is "one million, two hundred forty-two thousand, fifty-five".